package com.episode5;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class EncodingFilter implements Filter {
	
	private String encoding = null;

	@Override
	public void destroy() {
		this.encoding = null;
	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		res.setCharacterEncoding(encoding);
		chain.doFilter(req, res);
	}

	@Override
	public void init(FilterConfig config) throws ServletException {
		this.encoding = config.getInitParameter("encoding");
	}

}
